Unreal Engine Issues
Unreal Engine Issues
Specular highlight and roughness issue on clearcoat material with second normal at certain view angles
UE - Graphics Features - May 21, 2025Specular highlights on non-Nanite meshes with a clearcoat material that has the second normal enabled will disappear at certain view angles. This can be worked around by adding a constant node to th ...
Bone names of ~100 characters or longer crash the editor when baking to control rig
UE - Anim - Rigging - Control Rig - May 15, 2025This is an issue with inconsistencies over rig names and how control names are generated. We expect that a control name will be appended with _CONTROL or _CURVE_CONTROL. But because URigHierarchy: ...
Texture color encoding (sRGB) issue
UE - Texture - May 14, 2025There seems to be a regression with linear textures (commonly for multi-channel masked textures) in UE5.4. Setting the "Encoding Override" (under Texture > Advanced > Source Color Settings) to "Line ...
Editor 'Build All Levels' discards Volumetrics Lightmaps in persistent level
UE - Graphics Features - May 14, 2025Building the level or lightmaps can clear the volumetric lightmap. In 5.5, this requires you to perform a full build, or a lighting only build with a BSP brush in the scene. In 5.6, all level build ...
ResavePackages commandlet (buildlighting) fails/asserts on reflection captures in non-visible sub-levels
UE - Graphics Features - May 13, 2025When building reflection captures through the ResavePackages commandlet, it frequently triggers an ensure inside of ReflectionEnvironmentCapture.cpp. If distributed shader builds start causing prob ...
Reference Viewer doesn't show references to Primary Asset IDs
UE - Editor - Workflow Systems - May 13, 2025Context Reference Viewer can be used to view references between assets. There is a setting 'Show Management References' whose tooltip implies that references via PrimaryAssetID should be findable t ...
Meta Quest - Visual Artifacting in right eye with Lumen enabled and effects quality set to High
TM - VR - May 9, 2025Reported in SF [Link Removed] On Meta Quest headsets, when Lumen is enabled for VR, setting the Effects Quality to High can cause visual artifacts to appear in reflections in the right eye of the h ...
PIE Seamless Travel with a standalone level instance causes assert in UWorldPartition::BeginDestroy
UE - World Creation - Worldbuilding Tools - Level Instances - May 8, 2025This check is hit on the server instance while it is performing garbage collection during the seamless travel. During this garbage collection, it will determine that the UWorldPartition object belon ...
Actor Channel failure occurs when quickly unloading and loading a streaming level
UE - Networking - May 8, 2025With high enough latency, quickly unloading an reloading a streaming level with a replicated actor on the server can cause the actor channel on the client to fail to find this actor: UActorChannel:: ...
SKP Import - Applied texture maps from previous Twinmotion versions are lost after reimport in TM 2025.1.1
TM - Interoperability - May 8, 2025Reported in SF [Link Removed] For SKP imports that were added to a file in a previous version of Twinmotion, when the .tm file is concerted to and opened in TM 2025.1.1, if the SKP model is re-impo ...